Climate Change Could Be Taking the Ocean’s Breath Away

The Labrador Sea, known as the ocean's lung, plays a crucial role in marine ecosystems by providing oxygen to deep-sea life in the Atlantic Ocean. This process is driven by density-driven circulation, where cold, salty water sinks, carrying oxygen absorbed from the atmosphere. Climate change, particularly the melting of the Greenland ice sheet, threatens this process by altering seawater salinity and density. Additionally, ocean currents help absorb carbon dioxide, mitigating global warming. However, changes in these systems could reduce the ocean's ability to sequester carbon dioxide, exacerbating climate change.

What is the primary reason the Labrador Sea is referred to as the ocean's lung?

• It is the largest sea in the world.

• It produces oxygen through photosynthesis.

• It absorbs carbon dioxide from the atmosphere.

• It supplies a large portion of oxygen to deep-sea life in the Atlantic.

How does the melting of the Greenland ice sheet affect the Labrador Sea?

• It has no impact on the sea.

• It causes the sea to freeze over.

• It introduces fresh water, reducing salinity and affecting circulation.

• It increases the salinity of the sea.

What is the consequence of reduced salinity in the Labrador Sea?

• Increased oxygen levels in the deep sea.

• Enhanced density-driven circulation.

• Less oxygen reaching the deep sea.

• More carbon dioxide absorption.

How does the Labrador Sea contribute to mitigating global warming?

• By reducing the amount of sunlight reaching the Earth.

• By releasing methane into the atmosphere.

• By absorbing carbon dioxide from the atmosphere.

• By increasing the Earth's temperature.

What could happen if the ocean's ability to absorb carbon dioxide decreases?

• Global warming could accelerate.

• Global warming could slow down.

• The ocean would become more oxygen-rich.

• The ocean would become less acidic.